Heat Sensitive Ink by Candis October 10, 2007 Uncategorized 6 I didn’t know heat sensitive ink existed. This poster was created to invite people to interact with the artwork. When you touch the poster the colors change. This is something I would LOVE to have in my house, heat sensitive wallpaper. Although I’m not crazy about the design I would still buy it. When the wallpaper gets warm the flowers bloom. So cool!